Kmdf Hid Minidriver For Touch I2c Device Calibration File

In your EvtDevicePrepareHardware callback, read the calibration values from the : Use WdfDeviceOpenRegistryKey . Fetch values like XOffset , YGain , or Orientation .

Keep your calibration math fast. Use fixed-point arithmetic instead of floating-point to avoid performance hits in the kernel. kmdf hid minidriver for touch i2c device calibration

In the Windows architecture, your KMDF minidriver acts as a transport minidriver. It wraps I2C transactions into HID reports that the mshidkmdf.sys class driver understands. Calibration usually happens at one of three levels: The touch IC handles offsets internally. In your EvtDevicePrepareHardware callback